<template>
  <ele-card header="用于试卷批阅">
    <div style="margin-bottom: 12px">点击鼠标右键评分</div>
    <ele-viewer
      ref="viewerRef"
      src="https://cdn.eleadmin.com/20200610/pECunlF.jpg"
      :markers="paperMarkers"
      :image-style="{ filter: 'contrast(120%)' }"
      style="height: 560px; max-width: 900px"
      @contentContextmenu="handleContentContextmenu"
    >
      <template #markerItem="{ item }">
        <div v-if="item.isPanel" class="paper-score">
          <div class="paper-score-content">
            <template v-if="item.selected != null || item.selectedDecimal">
              <span>{{
                (item.selected ?? 0) + (item.selectedDecimal ? 0.5 : 0)
              }}</span>
              <span>分</span>
            </template>
          </div>
          <div
            :class="[
              'paper-score-panel',
              { 'is-top-left': item.placement === 'topLeft' },
              { 'is-top-right': item.placement === 'topRight' },
              { 'is-bottom-left': item.placement === 'bottomLeft' },
            ]"
            @contextmenu.stop.prevent=""
          >
            <div class="paper-score-panel-list">
              <div
                v-for="num in 11"
                :key="num"
                :class="[{ 'is-active': item.selected === num - 1 }]"
                @click="handleScoreClick(num - 1)"
              >
                {{ num - 1 }}
              </div>
            </div>
            <div class="paper-score-panel-list">
              <div
                :class="[{ 'is-active': item.selectedDecimal }]"
                @click="handleDecimalClick"
              >
                0.5
              </div>
            </div>
            <div class="paper-score-panel-footer">
              <el-button
                size="small"
                class="ele-btn-icon"
                @click="handleCancel"
              >
                取消
              </el-button>
              <el-button
                type="primary"
                size="small"
                class="ele-btn-icon"
                @click="handleSave"
              >
                确定
              </el-button>
            </div>
          </div>
        </div>
        <div v-else class="paper-score">
          <div class="paper-score-content">
            <span>{{ item.score }}</span>
            <span>分</span>
          </div>
          <el-icon
            @click="handleScoreDelete(item)"
            @contextmenu.stop.prevent=""
          >
            <CloseCircleFilled />
          </el-icon>
        </div>
      </template>
    </ele-viewer>
    <div style="margin-top: 12px">
      <el-button class="ele-btn-icon" @click="handleCallViewer('zoomIn')">
        放大
      </el-button>
      <el-button class="ele-btn-icon" @click="handleCallViewer('zoomOut')">
        缩小
      </el-button>
      <el-button class="ele-btn-icon" @click="handleCallViewer('rotateLeft')">
        向左旋转
      </el-button>
      <el-button class="ele-btn-icon" @click="handleCallViewer('rotateRight')">
        向右旋转
      </el-button>
      <el-button class="ele-btn-icon" @click="handleCallViewer('autoIntoView')">
        自适应缩放
      </el-button>
      <el-button class="ele-btn-icon" @click="handleCallViewer('reset')">
        重置
      </el-button>
    </div>
  </ele-card>
</template>

<script setup>
import { ref } from "vue";
import { CloseCircleFilled } from "@/components/icons";

/** 试卷批阅标记数据 */
const paperMarkers = ref([
  { key: 1, x: 1080, y: 208, fixed: true, score: 6 },
  { key: 1, x: 1100, y: 980, fixed: true, score: 9 },
]);

/** 删除分数 */
const handleScoreDelete = (item) => {
  const index = paperMarkers.value.indexOf(item);
  if (index !== -1) {
    paperMarkers.value.splice(index, 1);
  }
};

/** 打开评分面板 */
const handleContentContextmenu = (e) => {
  e.preventDefault();
  // 自动调整面板位置
  let placement = void 0;
  const rect = viewerRef.value?.$el?.getBoundingClientRect?.();
  if (rect) {
    let isLeft = false;
    let isTop = false;
    if (rect.right - e.clientX < 220) {
      isLeft = true;
    }
    if (rect.bottom - e.clientY < 168) {
      isTop = true;
    }
    if (isLeft || isTop) {
      if (isLeft && isTop) {
        placement = "topLeft";
      } else if (isTop) {
        placement = "topRight";
      } else {
        placement = "bottomLeft";
      }
    }
  }
  // 在右键位置打开
  const x = e.offsetX;
  const y = e.offsetY;
  const item = paperMarkers.value.find((d) => d.isPanel);
  if (item) {
    item.x = x;
    item.y = y;
    item.selected = void 0;
    item.selectedDecimal = false;
    item.placement = placement;
    item.key = Date.now();
    return;
  }
  paperMarkers.value.push({
    key: Date.now(),
    x,
    y,
    fixed: true,
    isPanel: true,
    placement,
  });
};

/** 分数选项点击事件 */
const handleScoreClick = (num) => {
  const item = paperMarkers.value.find((d) => d.isPanel);
  if (item) {
    item.selected = item.selected === num ? void 0 : num;
    if (item.selected === 10 && item.selectedDecimal) {
      item.selectedDecimal = false;
    }
  }
};

/** 分数小数选项点击事件 */
const handleDecimalClick = () => {
  const item = paperMarkers.value.find((d) => d.isPanel);
  if (item) {
    if (item.selected === 10) {
      item.selected = void 0;
    }
    item.selectedDecimal = !item.selectedDecimal;
  }
};

/** 关闭评分面板 */
const handleCancel = () => {
  const index = paperMarkers.value.findIndex((d) => d.isPanel);
  if (index !== -1) {
    paperMarkers.value.splice(index, 1);
  }
};

/** 保存添加分数 */
const handleSave = () => {
  const item = paperMarkers.value.find((d) => d.isPanel);
  if (item == null || (item.selected == null && !item.selectedDecimal)) {
    handleCancel();
    return;
  }
  const score = (item.selected ?? 0) + (item.selectedDecimal ? 0.5 : 0);
  paperMarkers.value.push({
    key: Date.now(),
    x: item.x,
    y: item.y,
    fixed: true,
    score,
  });
  handleCancel();
};

/** 查看器组件 */
const viewerRef = ref(null);

/** 调用查看器组件方法 */
const handleCallViewer = (methodName) => {
  if (viewerRef.value) {
    viewerRef.value[methodName]();
  }
};
</script>

<style lang="scss" scoped>
.paper-score {
  width: 0;
  height: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  position: relative;

  & > .paper-score-content {
    flex-shrink: 0;
    width: 34px;
    height: 34px;
    line-height: 34px;
    border-radius: 50%;
    color: #fff;
    font-size: 14px;
    background: rgba(22, 119, 255, 0.68);
    white-space: nowrap;
    text-align: center;

    & > span + span {
      font-size: 12px;
      vertical-align: 1px;
    }
  }

  & > .el-icon {
    color: #ff4d4f;
    font-size: 16px;
    position: absolute;
    background: #fff;
    border-radius: 50%;
    top: -20px;
    right: -24px;
    pointer-events: auto;
    cursor: pointer;

    &:hover {
      color: #cc3e3f;
    }
  }
}

/* 评分板 */
.paper-score-panel {
  width: 220px;
  padding: 10px;
  border-radius: 6px;
  background: var(--el-bg-color);
  box-shadow: var(--el-box-shadow-light);
  box-sizing: border-box;
  position: absolute;
  top: 20px;
  left: -18px;
  pointer-events: auto;
  cursor: default;

  &.is-bottom-left {
    left: auto;
    right: -18px;
  }

  &.is-top-right {
    top: auto;
    bottom: 20px;
  }

  &.is-top-left {
    top: auto;
    left: auto;
    right: -18px;
    bottom: 20px;
  }
}

.paper-score-panel-list {
  display: grid;
  gap: 6px;
  grid-template-columns: repeat(6, 1fr);
  margin-bottom: 10px;

  & > div {
    height: 22px;
    line-height: 22px;
    color: var(--el-text-color-primary);
    font-size: 12px;
    border-radius: 4px;
    border: 1px solid var(--el-border-color);
    transition: all 0.2s;
    text-align: center;
    cursor: pointer;

    &:hover {
      border-color: var(--el-color-primary);
    }

    &.is-active {
      color: #fff;
      background: var(--el-color-primary);
      border-color: var(--el-color-primary);
    }
  }
}

.paper-score-panel-footer {
  display: flex;
  align-items: center;
  justify-content: flex-end;

  & > .el-button + .el-button {
    margin-left: 8px;
  }
}
</style>
